Charleston South Carolina Climate Data

Monthly Average Climate Data for Charleston South Carolina

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January4.7 °C14.9 °C80.26 mm
February5.8 °C16.3 °C82.04 mm
March9.4 °C19.6 °C86.11 mm
April13.6 °C23.2 °C82.55 mm
May18.6 °C27 °C83.57 mm
June22.4 °C29.9 °C148.34 mm
July24.2 °C31.7 °C183.39 mm
August23.7 °C31 °C176.53 mm
September21.2 °C28.8 °C138.68 mm
October15.7 °C24.8 °C115.32 mm
November9.7 °C20.1 °C69.6 mm
December6.4 °C16.4 °C89.66 mm
Annual14.6 °C23.6 °C1336.05 mm

Climate Data for Charleston South Carolina

Average First Frost DateJan. 1 - Jan. 10
Average Last Frost DateFeb. 21 - Feb. 29
Average Days With Frost5-10 Days
Plant Hardiness Zone - 2023Zone 9a : -6.7°C to -3.9°C
Plant Hardiness Zone - 2012Zone 9a : -6.7°C to -3.9°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate